(1. 中南大学 化学化工学院 有色金属资源化学教育部重点实验室，长沙 410083；
2. 株洲冶炼集团股份有限公司，株洲 412000)
摘 要: 应用相律对Pb-S-O体系内组分进行分析，确定了该体系可能存在的4个三凝聚相点。结合拓扑规则和相关平衡反应的热力学计算，绘制该体系三凝聚相点之间的两种关联图：α型平面拓扑图和β型平面拓扑图。分析结果表明：β型平面拓扑图与传统Pb-S-O体系优势区图一致，说明可以基于拓扑规则绘制Pb-S-O体系优势区图；α型平面拓扑图可以解释Kivcet炼铅工艺在高氧位、高硫位条件下直接生成大量粗金属Pb的现象。
关键字: Pb-S-O体系；优势区图；拓扑规则；热力学计算；Kivcet法
（1. Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education,
School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
2. Zhuzh）
Abstract:The components of Pb-S-O system were analyzed with phase rule, and four coexisting points of three condensed phases were determined. The relation-diagrams among coexisting points of three condensed phases for the Pb-S-O system, which were denoted as α plane topological diagram and β plane-topological diagram, were plotted based on topological rules and thermodynamic calculation of related equilibrium reactions. The results show that the β plane- topological diagram is in accordance with the predominance area diagram of Pb-S-O system calculated by traditional methods, indicating that this method is feasible to plot predominance area diagram of Pb-S-O system. Meanwhile, α plane-topological diagram can be used to elucidate the phenomenon of which crude lead is generated under high oxygen and sulfur pressures during Kivcet process.
Key words: Pb-S-O system; predominance area diagram; topological rules; thermodynamic calculation; Kivcet process
